100% hit rate with Infinite Rocket Launcher.

To do this, you need at least one normal weapon, and the Infinite Rocket Launcer.

At the begining of each chapter hit an enemy with any weapon once (any weapon other than the IRL) You can then fire away at anything with the Rocket Lancher, no matter if you hit or miss an enemy, and you will get 100% hit rate at the end of the chapter.
This happens because the game does not register the Rocket Launcher hits like the other weapons hits.

Contributed By: koyuga.

Bypassing the Los Gigantos boss fight.

When you reach the underground Castle area in which you have to fight two El Gigantes, you can bypass this difficult fight entirely. Climb the ladder and ride the zip line down to the trap door switch. Run back and do this over and over again really fast. Eventually you'll be able to get to the zip line before the actual zip line does, and riding it down will trap you inside the wall. From there, turn right and walk through the wall past the locked door. This bypasses the fight entirely, because you're glitch-walking behind the spot where the cutscene for the fight is supposed to take place.

Contributed By: UltimaterializerX.

How to make the Gatling Gun appear without allowing the red monk to use it

In the castle, there is a glitch where you can make the Gatling Gun appear without allowing the red monk to operate it.

First, progress normally and let the red monk escape. Once you return to the turret room, he will be operating the gatling gun. Immediate leave the room and return to the main hall with the merchant and save.

Load the game and re-enter the turret room. You need to chase the red monk again until he returns to the turret room. When you return to the turret room, the turret will be raised, but the red monk will be standing outside of the turret ring! Without the turret on his side, finish him with ease!

Contributed By: Maehara Shinobu.

Instant KO against gatling gun Ganados

When you get to the second wave of enemies when Mike is helping you, destroy the guns with the Infinite Rocket Launcher BEFORE you enter that area. Once you go past the shutters, the Ganados will rush to their posts, but only to die immediately. It will also work with the regular Rocket Launcher, but that only has one shot, so... yeah.

Contributed By: falcofan88.

"Assignment Ada" Mini-Game

Contributed By: dominator912.

"The Mercenaries" Mini-Game and Characters

Contributed By: dominator912.

Alternate title screen

Contributed By: Wario64.

Bottle Caps

After you enter the Castle, and go through the Hall of Water(Y' Know.... that place that you have to protect Ashley as she turns the Cranks) to the Observation Hall. Next to the Merchant, A blue door with golden gun engravements lies in wait. Go through the door and begin the Target Practice game. Select Game Type A to begin a game. During certain portions of the game, other blue doors similar to this can be found. Enter them and finsh the Target practices by fetting 3000 points or higher to get 6 bottle caps. After you get 6, talk to the merchant and end the game. If you collected 6 different caps of the same game type, you will get some pesetas.

Contributed By: Masterbobo3 and ochigawa.

Broken Butterfly

In the hall south of the hedge maze there is a locked door. Return to that area with Ashley, piggy back with her and she will unlock the door.

Contributed By: Undergrads2003.

Chicago Typewriter

Contributed By: Biohazard79.

Harder Difficulty

In Professional difficulty, everything is the same except for the fact that enemies are alot tougher to kill.

Contributed By: dominator912.

Special Costumes

After beating the game the first time, when starting a new game or playing a Round Two game, a new option appears that allows for Leon and Ashley to wear special costumes. Leon wears an R.P.D. uniform, Ashley wears pop sensation clothes, and Ada wears her black outfit from her mini-game.

Contributed By: Reaper.

Unlock "Exclusive" Upgrades

Once you have fully upgrades every stat for a specific weapon, you can purchase an expensive "Exclusive" upgrade for that weapon.

Note: Killer7 has no "Exclusive" Upgrade.

Contributed By: Troy Mclure.

Unlock Infinite Rocket Launcher And Matilda Handgun

Beat the game to unlock the Matilda handgun and the Infinite Rocket Launcher. The items will be unlocked for purchase at any merchant if you load up a "Round 2" game save. The weapons come with a hefty price, too.

Contributed By: asianlightning.

Unlock the Handcannon

In the course of the mercenaries game, you can unlock extra characters by completing the maps with a high score, in addition to secret characters, you can also unlock weapons. The total cost of the Handcannon's upgrades is 790,000 pesetas.

Contributed By: Ren Keron.

Alternate music in "Assignment Ada" credits

After you watch the credits at the end of "Assignment Ada" it will ask you if you would like to watch the credits again. Choose "yes" and it will play the credits again but with different music.

Contributed By: K Prime04.

Del Lago Secret

When you first enter the area where you fight Del Lago, the monster in the water, head down to the dock. If you shoot the water about eight to fifteen times, you will get see what he thinks of you.

Contributed By: Neo Ganon.

Extra Enemies

This trick will summon cannon fodder your way. In the graveyard area, with the church where Ashley is actually held, there is a bell tower connected to the church (to its right). If you ring it, they will come. You can shoot it three times only. The first and second waves of enemies will come from the cave entrance and the third will come from the bridge area.

Contributed By: s96noopnoskcid.

Hidden Trailers

If you don't push any buttons at the title screen. Then after about a minute or so a never-before-seen trailer will play. If you do the same thing at the title screen after the 1st trailer has played then the trailer from The Tokyo Game Show of 2004 will play. It will play these 2 trailers for as many of times as you don't push any buttons at the title screen.

Contributed By: lgndryhr.

Killer7 Endorsement

Later in the game, the Merchant has a gun called "Killer7". This powerful magnum shares the name of an upcoming title by Capcom called "Killer 7".

Contributed By: samthebigkid.

Leon does jet ski jump.

In the final area when Leon and Ashley are on the jet ski, if you press the L & R buttons and jump just before you do this, Leon will do a spin on the jet ski.

Contributed By: Megaman1981.

Looking at Ashley the wrong way

When Ashley is following you find something somewhat high off of the ground and climb on top. Then tell Ashley to stay put. Go below where you left Ashley standing. When you are underneath and you try to move the C-Stick up to look at Ashley, she will ask Leon what is he looking at and call him a pervert.

Contributed By: Absolut Carnage.

Alternate Ada Scene

After your second encouter with The Village Chief head straight back to the previous room where you met him. A scene will occur where Ada saves you from The Village Cheif again.

Contributed By: Asuka Kazama.

Ambush Congregation in the Castle for $$

In the castle area, right after engaging the Bugs in the sewers, you will see a large group of Ganados Zealots in mid prayer. If you spook them they will run away, and you miss out on ALOT of money. Right before the sewer they give you a flash grenade. SAVE IT. When preparing the ambush on the congregation, go north then swing across the chandelier. When on the other side look down, and try to hit them all with a flash grenade to stun. Immediately jump down and run north to their exit point so you lock them in. If you have an incendiary or frag grenade you could use it here, other wise line them up for some shotgun carnage. They will each drop a spinel and their leader drops an Illuminados pendant, worth around 32000 altogether.

Contributed By: Runner16.

Detect Cloaked Parasites

When you walk into a room you suspect the parasite things inhabit. Use the laser and move it around the room. It will glow brighter if one is there.

Contributed By: XXSolarXX.

Extra ammo

When in the cabin with Luis (and Ashley), fighting the Ganados coming through the windows, stand by Luis. If you stand near him for long enough, he will start throwing handgun ammo to you.

Contributed By: snake138.

Extra Colored Eyes treasures

Before you enter the clocktower section, if you destroy the Novistador nest, a lot of Red / Blue / Green Eye treasures will be dropped.

Contributed By: Maehara Shinobu.

Extra Scene With Luis

During the part where Leon and Luis defend the cabin, shoot Luis with your pistol (or any other gun) around 8 or more times. You will get a cut scene where Luis will shoot Leon back, and give you a game over.

Contributed By: BishtrainerTai16.

Free Ammo

When you upgrade any weapon's capacity at a merchant, he will refill the magazine free of charge. This is very helpful with the magnum, or TMP

Contributed By: TheJackyl.

Free Eggs

At any location with chickens, you can sometimes find eggs. If you save nearby, then reset the game and reload your file, then run around in circles in an area with chickens, in about 1-5 minutes, more eggs will be laid! Free health if you ever need it! Best area to do this is the farm.

Contributed By: BlueTaco.

Get extra money and items

At various points throughout the game, you will come across different animals such as crows and fish. These animals can be shot and will reveal different items or amounts of money to obtain.

Contributed By: DVDMAN77.

Hidden Conversation With Hunnigan.

Near the church in Chapter 1-3, instead of going up to the church, take the path towards the lake. This will trigger a conversation with Hunnigan, where Leon stumbles with words.

Contributed By: Phyre_2.

How to avoid the first battle with Krauser in the fortress

When you enter the fortress and trigger the conversation with Krauser, immediately run forward to the shack with the locked door. Examine the door and the light will switch to red.

It will take a few minutes before the door automatically unlocks. Smash the boxes on both floors for items.

Meanwhle, Krauser will come to hunt you down. However, you can avoid the battle completely! Instead of wasting ammo and losing health to confront him until he uses the flash grenade, simply climb the ladder up and down! Krauser cannot hurt you when you climb the ladder!

Repeat the ladder climbing process until the door unlocks!

Contributed By: Maehara Shinobu.